Add each item's UPC code to print in the picking ticket.
Assumption: The field is not available on the list of column fields in Sales Order form as standard.
Solution: Create a custom line field (UPC code) and source that from the Item record.
1. Navigate to Customization > Lists, Records & Fields > Transaction Line Fields > New.
2. Label = UPC Code.
3. Type = Free-Form Text.
4. Applies To tab = Sales Item and Print on Picking Ticket.
5. Sourcing & Filtering tab > Source List = Item; Source From = UPC Code.
6. Click Save.
7. Go to a sample Sales Order > hover your mouse to Customize > click on Customize Form.
8. In the Printing Fields tab > Columns sub tab > enable the UPC Code.
9. Click Save.
10. Edit the sample Sales Order and re-enter the item.
11. Click Save.
12. Click Print Picking Ticket.